壳聚糖复合涂膜对鲜切冬枣安全性与贮藏品质的影响  

Effects of Chitosan-based Coating on Safety and Storage Quality of Fresh-cut Chinese Winter Jujube

作　　者：万丽[1] 申琳[1,2] 赵丹莹[1] 丁洋[1] 生吉萍[1] 

机构地区：[1]中国农业大学食品科学与营养工程学院,北京100083 [2]新疆农业大学食品科学学院,新疆乌鲁木齐830052

出　　处：《食品科学》2009年第4期277-281,共5页Food Science

基　　金：国家自然科学基金项目(30571296;30671471);公益性行业(农业)科研专项经费资助项目(200803033)

摘　　要：以残次冬枣为实验材料,通过正交试验,以VC的损失为指标确定了一种新型壳聚糖复合涂膜剂。结果表明:复合涂膜剂的最佳配方为1.0%壳聚糖+1%柠檬酸+2%乳清蛋白+0.3%CaCl2。经该复合涂膜剂处理后的冬枣,在2℃下的贮藏品质明显提高。结果显示涂膜处理显著抑制了贮藏中微生物(细菌、霉菌及酵母、大肠杆菌)数量的上升(p<0.05),从而在一定程度上防止了微生物腐败的发生;降低了冬枣中营养物质的降解和转化,总糖及可溶性蛋白含量均被显著降低。此外抗氧化酶(CAT、POD、SOD)活性的检测结果也在一定程度上证明了复合涂膜处理对于冬枣品质的保护作用。A novel chitosan-based coating was developed through orthogonal test with inferior Chinese winter jujube used as experimental material and loss of vitamin C as a indicator.The results showed that the best formula of coating is 1.5% of chitosan,1% of citric acid,2% of whey protein and 0.3% of CaCl2.The quality of fresh-cut winter jujube is improved significantly by chitosan-based coating treatment,which is stored at 2 ℃.The coating can strongly inhibit the numbers of total bacteria,yeast,mold and E.coli,prev...

关 键 词：壳聚糖 涂膜 冬枣 鲜切 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]